the first technology of its kind... mom and dad, i have great news. is now providing answers families need. siemens. answers. >>> welcome back to our continuing coverage. i'm wolf blitzer reporting live here in boston. cnn can now exclusively reveal the alleged boston bomber tamerlan tsarnaev had video of a well-known jihadist on his u youtube channel. the video is of an individual who is himself killed by russian forces last december, only a few months ago. he died in the capital of dagestan in russia where tamerlan's father currently lives, and where tamerlan spent at least six months last year. cnn cannot confirm that tamerlan and the man actually met in dagestan. the video, though, has been deleted from tamerlan's youtube account, but was tracked down by cnn. these are important developments we're trying to learn as much about both of these suspects as we possibly can. let's go live to dagestan right now. nick walsh is in the town there. it's near chechnya. you heard from a rebel chechen group in the area about the two bombing suspects, one dead,